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Up Topic The Rybka Lounge / Computer Chess / i9-7960X 16-Core 2.8 vs i9-9960X X 16-Core 3.1
- - By RFK (Gold) Date 2019-08-27 20:18 Edited 2019-08-27 20:31
No  "seeming" diff between the two!
However, when it comes to the
i9-9940X 14-Core 3.3 GHz vs i9-7940X 14-Core 14-Core 3.1
one spec in the i9-9940X is missing "8 GT/s DMI" that is present in the i9-7940X.
But the i9-9940 has a noted jump in speed.

What interests me is the i7-7940X is $1,339
while the i9-9940X is $1,099?
is the noted missing parameter "8 GT/s DMI" in the i9-9940 worth that much of a price cut? Or is there a deeper issue with the i9-9900K series in general?

I'm looking at a next build so this is a quandary issue!

Lukas usually has insight into what's going on with processors. In my  attempted researching, the tech community re: the  i9-9900K series - hard to find any reviews and those I do find aren't very favorable!
Parent - - By RFK (Gold) Date 2019-08-27 22:44 Edited 2019-08-27 23:06
Thanks for that quick response -
I agree Ryzen does appear faster!
I'm still wondering what would be the significance of the lack of
8 GT/s DMI in the i9-9940 specs as opposed to its inclusion in the i9-7940X

"What is 5 GT/s DMI bus speed of the processor?
BY BoSsSyY | FEBRUARY 1, 2018 5:20 AM PST
What is 5 GT/s DMI bus speed of the processor? Now I don't ask what a "bus" is, I am asking what this number and words are "5 GT/s DMI". Also if a processor has a higher bus speed supported than the motherboard will it be incompatible? Because I've read in this thread:

that higher speed of the processor will be incompatible with the motherboard (which is kind of strange because most of the processors
nowadays have much higher speed than the bus speed supported by the motherboards."

I think what it boils down possibly is this " Just because the CPU has the same socket as the motherboard doesn't mean the motherboard actually supports it." ?

Otherwise they are the same with the exception of core speed! Also I don't see MMX instruction for  i9-9940X!
Parent - By MrKris (**) Date 2019-08-27 23:43
There is absolutely no doubt:
the i9-9940X is a slight tweek of the same architecure and nearly identical older i9-7940X - currently price reduced to better compete with AMD cpu's.

The official Intel code (they explain it somewhere) is the clue: same official SkylakeX designation, same i9, same _940, same X; newer 9xxx line-up than the 7xxx's.

(The web is full of even worse examples of obsolete computer hardware sellling for their very old list prices far above current products that out-perform for much less, particularly laptops and pre-built desktops, probably Xeon's too.
There is always fewer reviews at for the newer than for the older products.)

Except for Ryzen/other alternatives: Take your sale price for the new i9-9940X for a slight, if anyone can ever notice, improvement over the old i9-7940X.

- Intel Official Site:
Launch Date Q3'17
Recommended Customer Price
$1387.00 - $1399.00
Launch Date  Q4'18
Recommended Customer Price
$1387.00 - $1399.00


- Tom's Hardware forum:

Nov 26, 2018 
Hi. Recently, in February I bought the Core I9 7940x processor, it works fine. Now I have discovered that there is the novelty of the Core i9 9940x, but from what I have read the features seem the same and have the same price, so my question is what is new or different on the new 9940x ?. Thank you. Greetings.

Nov 26, 2018
There is very little difference between the CPUs. They are made on the same architecture. The 9940x has slightly higher clock speeds. But it is definitely not worth considering the 9940x over your current 7940x because it really is not an upgrade.
Parent - By dorszcz (**) Date 2019-08-28 06:56
If you want to buy new computer and you can afford these i9, it's better to wait for Ryzen 9 3950x for $749 available in September. Comparing to 3900x it has smaller base clock 3.5GHz instead of 3.8 but 16 cores, not 12.
Parent - - By Lukas Cimiotti (Bronze) Date 2019-08-31 06:27 Upvotes 1
i9-9940X has the same DMI (direct media interface) as  i9-7940X has. In fact, here in Germany i9-7940X cost less than i9-9940X.
For chess a Threadripper is a better choice. Also Ryzen 9 3900X / 3950X (soon to be released) look like a good deal.
Parent - By RFK (Gold) Date 2019-08-31 15:41
Hi Lukas,
Thanks for the heads up!
Parent - By MrKris (**) Date 2019-09-02 07:32

There is supposed to be new gen. Threadripper's someday.,40272.html has the 3900X for $529 but out of stock, not taking orders.
The same page has a link for their partner with it for $699 in stock.

$499 [original AMD list price] but "This new item, released in limited quantities, has already sold out. We're sorry, but we cannot accept more preorders at this time."

"Posted byu/Manana151
2 days ago
3900X still out of stock
Any ideas when there would be a restock in the UK? I've been waiting for over a month and it is becoming quite frustrating (Ordered mine from Amazon on 15th July). I also need it in order to start doing my uni work as VMs are a must for me. All I have now is an overheating laptop which isn't really that useful haha. I would be extremely glad if anybody knows something!" ... (US) has 3900X, no price, "See all buying options", there are 18 from:
$652.53 + $5.34 shipping Arrives between September 6-11.
$889.98 & FREE Shipping Arrives between Sept. 30 - Oct. 25.

Maybe taking orders: "Price: $544.15 + Free Shipping
Quantity: 1
More to Come
Last Updated: 09/02/2019 02:49:30
This item is directly shipped from Mfg. The handling time is estimated 3-4 weeks or less"

Survey: Only 5.6 Percent of Ryzen 9 3900X Hit Advertised Speeds, Most Other Models Suffer, Too,40291.html
"...Despite the controversy over AMD's advertised boost clocks, De8auer still says he recommends all the Ryzen 3000 CPUs; however, he also states that the results in his survey were much worse than he expected and is worried about whether or not AMD can solve this issue in a timely manner. He concludes his findings wondering why AMD would advertise these clock speeds. ..."
Parent - By DeepPuffin Date 2019-09-04 01:57
Hi Lukas, thank you for this information.

If I could trouble you, could I please ask what RAM set-ups you would pair with a 3900x or 3950x for chess?

Since those CPUs both support dual channel RAM, I wonder if the likely candidates would be one of:

1. 2x8 single rank for 16GB total
2. 2x16 dual rank for 32GB total
3. 4x8 single rank for 32GB total

It seems like the Ryzen 3000 memory controller and system are much improved over the previous generations, and perhaps 3600+ C14 configurations are possible. In fact, G.Skill is actually selling 3600 C14 kits (called "Trident Z Neo") in 2x8=16 and 4x8=32 formats. The best-tuned dual rank 2x16 formats seem to be available in 3200 C14 and 3600 C16 configurations.

Thanks very much for any thoughts.
Up Topic The Rybka Lounge / Computer Chess / i9-7960X 16-Core 2.8 vs i9-9960X X 16-Core 3.1

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